The fact that Bieber made the effort to fit in his schooling is fairly impressive. His girlfriend, Selena Gomez, also made time in between her hit TV show, busy touring schedule and film career to graduate from high school in 2010. But there are dozens of young stars in Hollywood, such as Beyonce, Britney Spears, Lindsay Lohan and Jessica Simpson, who didn't finish school once their careers took off.

And although he's done now, finishing school wasn't his highest priority. "[Graduating] was something my mom really wanted me to do, so I had to do it for her," he admitted, adding that he's more a fan of the school of life. "I mean, this kind of lifestyle has given me a different perspective on life. I've been able to travel the world. At school, usually you have to do a lot of writing and reading. I'm not really into that stuff. I like to be out there."